Funding for this research was provided by:
Chinese Academy of Medical Sciences (CAMS-I2M,2016-I2M-3-021)
National Natural Science Foundation of China (819272949)
Basical Scientific Research Fund Projects of Chinese Academy of Medical Sciences (2018PT31013)
Sub-Item of the Important and Special Project of the Science and Technology Ministry of China (2018ZX10734404)
Received: 21 August 2019
Accepted: 14 January 2020
First Online: 20 January 2020
Ethics approval and consent to participate
: We declare that no permission were necessary for the specimens used in our study.
: Not Applicable.
: The authors reports no conflict of interest.